Energy sword is not going to do anything to Odin. A pulse bolt from the other side of the world might hurt a little (they get stronger the farther they go).
To be honest, Iron Man doesn't have the energy expenditure to hurt Odin and the only times I can think of that he might have come close he was channeling Mandarin's energy as well or been hooked up to a larger power source outside of his armor.
Iron Man uses Jupiter's magnetic field to power his suit and magnetically hurls Odin into the sun.